Metal light blocking element, imaging lens assembly module and electronic device

Abstract

A metal light blocking element includes an outer diameter surface, a first annular surface, a second annular surface and an anti-reflecting layer. The outer diameter surface surrounds the metal light blocking element. The first annular surface is disposed opposite to the outer diameter surface, and the first annular surface is closer to a central axis than the outer diameter surface to the central axis. The second annular surface is disposed opposite to the outer diameter surface, the second annular surface is closer to the central axis than the outer diameter surface to the central axis, and the first annular surface is connected to the second annular surface to form a minimum opening structure. The anti-reflecting layer is disposed on the first annular surface and the second annular surface, and includes a light absorbing layer and a nanostructure layer. The nanostructure layer is disposed on the light absorbing layer.

What is claimed is: 
     
         1 . A metal light blocking element, surrounding a central axis, and comprising:
 an outer diameter surface surrounding the metal light blocking element;   a first annular surface disposed opposite to the outer diameter surface, and the first annular surface closer to the central axis than the outer diameter surface to the central axis;   a second annular surface disposed opposite to the outer diameter surface, the second annular surface closer to the central axis than the outer diameter surface to the central axis, and the first annular surface connected to the second annular surface to form a minimum opening structure; and   an anti-reflecting layer disposed on the first annular surface and the second annular surface, covering the minimum opening structure, and comprising:
 a light absorbing layer; and 
 a nanostructure layer disposed on the light absorbing layer; 
   wherein the minimum opening structure is a tip end opening structure, an angle is formed between the first annular surface and the second annular surface, the angle is α, and the following condition is satisfied:   0 degrees<α≤170 degrees.   
     
     
         2 . The metal light blocking element of  claim 1 , wherein the light absorbing layer is made of a carbon black material. 
     
     
         3 . The metal light blocking element of  claim 1 , wherein the nanostructure layer comprises a plurality of nanostructure units, and a nano-ridged convex structure layer is formed via the nanostructure units. 
     
     
         4 . The metal light blocking element of  claim 3 , wherein the nanostructure layer comprises a connecting layer, and the connecting layer is disposed between the light absorbing layer and the nano-ridged convex structure layer. 
     
     
         5 . The metal light blocking element of  claim 4 , wherein a thickness of the connecting layer is d, and the following condition is satisfied:
 30 nm≤d≤500 nm.   
     
     
         6 . The metal light blocking element of  claim 3 , wherein a height of each of the nanostructure units is h, and the following condition is satisfied:
 90 nm≤h≤350 nm.   
     
     
         7 . The metal light blocking element of  claim 6 , wherein the height of each of the nanostructure units is h, and the following condition is satisfied:
 90 nm≤h≤290 nm.   
     
     
         8 . The metal light blocking element of  claim 1 , wherein the tip end opening structure has at least one shrinkage cavity structure, and the at least one shrinkage cavity structure is closer to the central axis than a maximum outer diameter of the tip end opening structure to the central axis. 
     
     
         9 . The metal light blocking element of  claim 1 , wherein the angle is α, and the following condition is satisfied:
 10 degrees≤α≤150 degrees. 
 
     
     
         10 . The metal light blocking element of  claim 9 , wherein the angle is α, and the following condition is satisfied:
 20 degrees≤α≤120 degrees. 
 
     
     
         11 . The metal light blocking element of  claim 1 , further comprising:
 a recess structure disposed on at least one of the first annular surface and the second annular surface, the recess structure caving towards the outer diameter surface, and at least one portion of the anti-reflecting layer disposed on the recess structure.   
     
     
         12 . An imaging lens assembly module, comprising:
 an imaging lens set; and   at least one of the metal light blocking element of  claim 1 , wherein the at least one metal light blocking element is disposed opposite to the imaging lens set.   
     
     
         13 . An electronic device, comprising:
 the imaging lens assembly module of  claim 12 ; and   an image sensor disposed on an image surface of the imaging lens assembly module.   
     
     
         14 . A metal light blocking element, surrounding a central axis, and comprising:
 an outer diameter surface surrounding the metal light blocking element;   a first annular surface disposed opposite to the outer diameter surface, and the first annular surface closer to the central axis than the outer diameter surface to the central axis;   a second annular surface disposed opposite to the outer diameter surface, the second annular surface closer to the central axis than the outer diameter surface to the central axis, and the first annular surface connected to the second annular surface to form a minimum opening structure; and   an anti-reflecting layer disposed on the first annular surface and the second annular surface, covering the minimum opening structure, and comprising:
 a light absorbing layer; and 
 a nanostructure layer disposed on the light absorbing layer; 
   wherein a length of the first annular surface along the central axis is L 1 , a length of the second annular surface along the central axis is L 2 , and the following condition is satisfied:   0.01 mm≤L 1 +L 2 ≤3.00 mm.   
     
     
         15 . The metal light blocking element of  claim 14 , wherein the light absorbing layer is made of a carbon black material. 
     
     
         16 . The metal light blocking element of  claim 14 , wherein the nanostructure layer comprises a plurality of nanostructure units, and a nano-ridged convex structure layer is formed via the nanostructure units. 
     
     
         17 . The metal light blocking element of  claim 16 , wherein the nanostructure layer comprises a connecting layer, and the connecting layer is disposed between the light absorbing layer and the nano-ridged convex structure layer. 
     
     
         18 . The metal light blocking element of  claim 17 , wherein a thickness of the connecting layer is d, and the following condition is satisfied:
 30 nm≤d≤500 nm.   
     
     
         19 . The metal light blocking element of  claim 16 , wherein a height of each of the nanostructure units is h, and the following condition is satisfied:
 90 nm≤h≤350 nm.   
     
     
         20 . The metal light blocking element of  claim 19 , wherein the height of each of the nanostructure units is h, and the following condition is satisfied:
 90 nm≤h≤290 nm.   
     
     
         21 . The metal light blocking element of  claim 14 , wherein the length of the first annular surface along the central axis is L 1 , the length of the second annular surface along the central axis is L 2 , and the following condition is satisfied:
 0.03≤L 1 /L 2 ≤5.   
     
     
         22 . The metal light blocking element of  claim 14 , further comprising:
 a recess structure disposed on at least one of the first annular surface and the second annular surface, the recess structure caving towards the outer diameter surface, and at least one portion of the anti-reflecting layer disposed on the recess structure.   
     
     
         23 . The metal light blocking element of  claim 14 , wherein the minimum opening structure has at least one shrinkage cavity structure, and the at least one shrinkage cavity structure is closer to the central axis than a maximum outer diameter of the minimum opening structure to the central axis. 
     
     
         24 . A metal light blocking element, surrounding a central axis, and comprising:
 an outer diameter surface surrounding the metal light blocking element;   a first annular surface disposed opposite to the outer diameter surface, and the first annular surface closer to the central axis than the outer diameter surface to the central axis;   a second annular surface disposed opposite to the outer diameter surface, the second annular surface closer to the central axis than the outer diameter surface to the central axis, and the first annular surface connected to the second annular surface; and   an anti-reflecting layer disposed on at least one of the first annular surface and the second annular surface, and comprising:
 a light absorbing layer; and 
 a nanostructure layer disposed on the light absorbing layer; 
   wherein the nanostructure layer comprises a plurality of nanostructure units, a height of each of the nanostructure units is h, and the following condition is satisfied:   90 nm≤h≤350 nm.   
     
     
         25 . The metal light blocking element of  claim 24 , wherein a nano-ridged convex structure layer is formed via the nanostructure units. 
     
     
         26 . The metal light blocking element of  claim 25 , wherein the height of each of the nanostructure units is h, and the following condition is satisfied:
 90 nm≤h≤290 nm.   
     
     
         27 . The metal light blocking element of  claim 24 , wherein the light absorbing layer is made of a carbon black material.